Hydroides trompi Bastida-Zavala & ten Hove, 2003

(Figures 6, 12 G)

Hydroides trompi Bastida-Zavala & ten Hove, 2003: 104 –108, Figs 22A–Q, 23. Type locality: Miraflores Locks, Pacific coast of Panamá, intertidal ; Baja California and Baja California Sur; 2–3 m.

Eupomatus recurvispina (not Rioja, 1941).— Kudenov 1975: 228 (Station Beach, Puerto Peñasco, Sonora, bottom of basalt boulders); Kudenov 1980: 122, fig. 6.50 a–b (same).

Hydroides trompi .— Salazar-Vallejo & Londoño-Mesa 2004: 55 (Tropical Eastern Pacific, checklist); Bastida-Zavala 2008: 30, fig. 6U (Oaxaca; 6–10 m); Bastida-Zavala 2009: 535, Fig. 3 G (identification key for Tropical America); ten Hove & Kupriyanova 2009: 55 (worldwide serpulid checklist); Bastida-Zavala et al. 2013: 349 (Oaxaca, checklist).

Material examined. Three specimens.

Sonora: UMAR-Poly 787 (Puerto Peñasco, no more data, coll. SSV et al.) . Guerrero: UMAR-POLY 788, 2 spec. (Manzanillo Beach, Zihuatanejo, on Pocillopora damicornis, 5–7 m, December 4, 2011, coll. ALP).

Habitat. Intertidal to subtidal (10 m, Bastida-Zavala 2008). On cobbles surrounded by sand, mangrove roots, dead and live corals ( Pocillopora damicornis), spiny oysters ( Spondylus limbatus), rocks and on locks (upper and lower chambers) of the Panamá Canal (Bastida-Zavala & ten Hove 2003; Bastida-Zavala 2008). Occasionally part of fouling fauna.

Distribution. Tropical Eastern Pacific. Gulf of California, Oaxaca (México) and Panamá (Bastida-Zavala & ten Hove 2003).

Remarks. Hydroides trompi is found on several substrates; the type specimens came from the locks of Panamá Canal; it is rare.